Tanzanian Ambassador Liberata Mulamula says the Obama administration has indicated that it is willing to put up money to train rangers to help end poaching and trafficking in her country but has not made any commitment to provide drones. (Andrew S. Geraci/The Washington Times)

Robert Mueller’s special counsel investigation into Russian meddling in the 2016 election has cost $6.7 million during the first four and a half months of the probe. Click to see past independent counsel investigations guilty of racking up high bills.